Hierarchical Databinding while expanding GridRow

Hi,
I have a hierarchical grid with tabs in it. First-time binding data to grid works fine but once I expand and collapse the row(s), the data belong to the row does not bind properly. I'm using programmatic data-binding.

I tried the same scenario which worked as expected in my end. If you are binding the grid with NeedDataSource event, then there is no need to bind the grid in pageload. RadGrid fires the NeedDataSource event each time it needs to be bound to a data source. Also check the following demo which implements the same.Grid / Programmatic Binding

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I also tried rebinding it by calling Rebind() method but unfortunately, it causes an exception of stack overflow.
I afraid that my solution may not perform very well in case of huge amount of data but for now Its working fine for me.

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